FI83829B - CONTACT DETERMINATION FOR AVSKAERMADE SKAOP OCH RUM MED HOEGFREKVENSSKAERMADE, RELATIVT VARANDRA ROERLIGA HUSDELAR. - Google Patents

Description

Contact arrangement for protected cabinets and rooms with high-frequency tightly protected housing parts moving relative to each other 1 83829

The invention relates to a contact arrangement for protected cabinets and rooms with high-frequency tightly protected, movable housing parts, in particular door frames, doors, windows and window frames, which overlap at their edge areas and are protected by contact areas arranged on the edge areas of the housing parts. a knife contact system having a knife-like protrusion in the second housing part and contact springs in the second housing part interlocking in the contact position, and in addition a second contact system adapted to overlap the housing parts, displaced outwardly relative to the first contact system and ensuring continuous contact.

Such a contact arrangement is known, for example, from EP patent application no. 0095743.

- In telecommunications and high-frequency technology, it is fundamentally important to prevent the propagation of electric and magnetic fields to certain areas of space where they could cause interference. For this reason, it is often: Y necessary to protect individual electrical equipment from electrical interference by building it in protected cabinets or cages or also to implement entire rooms protected. Electrostatic fields can be completely protected with thin metal foils, while static magnetic fields are attenuated in rooms with walls made of ferromagnetic materials.

Since the protection between fixed and movable and mutually movable space protection contact devices, e.g. between frames and windows, frames and doors and two window or 2 83829 door halves, is weaker than in gapless wall areas, these contact points are usually the least damping areas. Therefore, there is still a need to adapt these contact areas to the current situation and to improve protection in these areas. In this case, especially at high frequencies in the MHz-GHz range, it is crucial that these contact arrangements form as reliable a contact as possible between the frames of the housing parts, e.g. doors and frames, in the areas of all connection edges of the housing parts. In particular, double doors have contact problems in the area of the main joint edge, i.e. in the area of the contact edge between the access door half and the closed door half, and in the door sills and in the area of the door hinge. Slots a few millimeters wide are created here, which most hitherto known contact arrangements, and in particular hitherto known contact spring arrangements, have not been able to connect and close. As a result, the protective effect is reduced in the high frequency range. Only the known contact arrangement according to EP patent application 0095743 mentioned in the introduction already contains attempts to solve the problem satisfactorily.

The object of the present invention is to provide a contact arrangement based on the EP patent application mentioned in the introduction, the damping and protection properties of which, as well as its structural implementation, are even better compared to it.

To solve this task, the contact device according to the invention is characterized in that an elastic high-frequency absorbing material is placed in the area between the two contact systems, which is attached to one of the housing parts moving relative to each other, and that the second contact system and part of the first contact system are supported. the edge area overlaps with the second housing part.

3 83829

The second contact system can be strip-like contact springs, a strip-like metal braid or also an elastic conductive strip, which are themselves arranged along insufficiently high-frequency sealed slots and, in particular, also in the corner areas.

The elastic absorbent material interposed between the two contact systems provides additional protection to correct any irregularities, e.g. due to manufacturing. Finally, the stiffening frame ensures the necessary mutual stability of the contact elements of the individual contact systems.

The invention will be explained in more detail below by means of an exemplary embodiment. In the drawing, Fig. 1 shows a partially sectioned and partial view of a double door with a contact arrangement according to the invention, Fig. 2 shows a partially sectioned view of a second view of the figure: ·. 1 with a contact arrangement according to the invention.

The double door according to Fig. 1 has a passage door half and a closed door half 1, 2 with, for example, mineral wool-filled frame elements 22, 23, cover plates 11, 12 and surrounding rectangular stiffening frames 24, 33 of rectangular cross-section. 2 stiffener frames 24 while shortening. This provides an overlap in the areas of the contact edges of both halves, which facilitates the placement of the second contact system between the housing parts moving in relation to each other, i.e. between the door halves and also between the door halves and the door frames.

The first high-frequency sealing contact device of this double door consists of a knife-like projection 5 which, in the closed position 83829 of the doors, enters a groove 13 and engages on both sides in contact springs connected to contact spring strips 6,6. These contact springs are in good electrical contact with the groove 13, are convex in the direction of the knife-like projection 5 and are pressed against the side walls 8 of the groove 13, respectively. 9 against e.g. the effect of hook-like clamping elements 7.7. The side walls 8,9 of the groove 13 and the knife-like projection 5 consist of suitably profiled plates, the ends of which are further away from the contact arrangement, in the embodiment shown are pressed against the stiffening frames 24 and 33 and frame elements 23, respectively. 22 between and welded to these high-frequency-tight.

In the closed position of the doors, the side wall 8 of the groove 13 rests, via its pin-ne element 7, against a damping effect 14 fixed to the plate 10. To improve the damping properties, the material of this response is made of an elastic, strip-like high-frequency absorbing material, e.g., an electrically conductive foam rubber.

The second contact system, which is displaced outwards relative to the first contact system and is supported by the stiffener frame 33, can be, for example, a continuous contact spring strip 20 fixed to the stiffener frame 33 by means of a profile plate 15.

From Fig. 2, in which the closed door half is not shown for the sake of clarity, it can be seen that the contact spring strip 20 in the closed position 20 'shown in broken lines also allows full contact and thus protection in the corner area 21.

In the illustrated embodiment, the second contact system is directed against the first (see area A). It is also conceivable, without considerable additional structural costs, to pass around the • · contact system and thus also to make contact at the side joint edges of the doors. If necessary, the contact spring strip 20 can be replaced by a strip-like metal braid or an elastic conductive strip.

This contact arrangement is sufficient to meet the protection requirements for it at low and medium frequencies, but it also meets these requirements at high frequencies, ie in the MHz / GHz band. Thus, e.g. in the region of the main connecting edge, i.e. the access door half and the closed door half 1, respectively. 2, in the area of the side joint edges, i.e. in the area of the doors and thresholds and in the area of the contact edges between the doors and the door frame and also in the area of the door corners, the contact formation of the opposing door elements is largely ensured. The elastic absorbent material placed between the two contact systems also complements the protection.

Claims (4)

1. Contact device for shielded cabinets and rooms with high-frequency shielded, relatively movable housing parts (1, 2), especially door frames, doors, windows and window frames, which overlap at the edge areas and which are shielded with the edge areas of the housing parts (1, 2) contact areas with a first contact device (5, 6, 6), in particular a knife contact device, with a knife-shaped projection (5) at one housing part (2) and contact springs (6, 6) at the second housing part (1), which run into each other in contact position, and in addition to this, a second contact device (20) arranged at the overlap area of the housing parts (1, 2), which is leaking in relation to the first contact device (5, 6, 6) and which ensures, especially at the corner regions, characterized in that elastically high frequency absorbent material (14) is provided in the area between said contact devices (5, 6, 6 and 20, respectively) which adjoining movable housing parts (1, 2), and as a supporting device for the second contact device (20) and part of the first contact device (5, 6, 6), a stiffening frame (33) attached to the second housing part (1) serves , whose edge area overlaps the other housing portion (2). Contact device according to claim 1, characterized in that, like the second contact device, band-shaped contact springs serve, in particular contact spring strips (20). Contact device according to claim 1, characterized in that the second contact device is a banded braided metal. Contact device according to claim 1, characterized in that the second contact device is an elastic conductive band.